Why does the air rise?

Question

Why does the air rise at 60 degrees North and South latitudes?

Answer 1

Surface heating like anywhere else.

Answer 2

I think its because of Outer Space its because of the gravity

Answer 3

Because of convection due to buoyancy which in turn is the result of intense heating of the surface area by the sunlight over a place.Sometimes,air rises due to forced convection over a mountain slope.

At 60 degrees latitude N and S,low pressure belts exist.In a low pressure area,winds converge from all directions and are forced to rise.

Answer 4

The answer is Windbelts.

The general wind circulation arises from the differential heating of land and water.  This differential heating causes relative high and low pressures.  This pressure gradient is the driving force behind winds.  The winds are also deflected by a force due to the rotation of the earth.  This force is called the Coriolis force.  The Coriolis force deflects the wind to the right in the northern hemisphere and to the left in the southern hemisphere.  

    The wind belts arise from three different three-dimensional wind "cells" that transfer air from the equator to the poles.  These cells are called the Hadley cell, the Ferrell cell and the Polar cell.  I will describe each of these cells below.



Hadley Cell

    This is the cell that is closest to the equator.  It consists of winds converging and rising  at the equator and then diverging north and south of the equator as it reaches the upper troposphere.  The winds then sink at 30 degrees latitude as they converge with winds in the Ferrell Cell.  They hit the surface and diverge back to the equator to complete the cell.  This provides the equator-ward wind component of the Trade Winds.



Ferrell Cell

    This cell has winds sinking at 30 degrees latitude and then traveling pole-ward as they hit the ground and diverge with winds from the Hadley Cell.  This provides the pole-ward component of the mid-latitude westerlies.  These winds travel towards the poles until they converge with winds in the polar cell at 60 degrees latitude.  These winds then rise up and spread out equator-ward to complete the cell.



Polar Cell

    This cell has winds rising up at 60 degrees latitude and spreading out pole-ward as they reach the upper troposphere.  The winds sink down at the poles and then diverge towards the equator until they reach 60 degrees latitude where they rise up again to complete the cell.  They provide the equator-ward component of the Polar Easterlies.

Answer 5

Polar Easterlies: These wind belts extend from the poles to 60 degrees north and south latitude. In general, air movement is from east to west in this area because the earth is rotating faster than the movement of air above it. Air is twisted when force created by earth's rotation affects it as it attempts to flow away from the poles.

main wind zones on earth -

Trade Winds: These winds are caused by cooler air moving in from the east, replacing the warm air rising over the equator. These wind belts provided popular routes for sailing vessels, as the breezes blow almost constantly. The name of these winds comes from the old Germanic word meaning"on course."

Horse Latitudes: Two narrow belts approximately 30 degrees north and 30 degrees south latitude where some of the warm air that rises over the equator sinks down again to the surface. Similar to the doldrums, the horse latitudes are areas of calm winds

Prevailing Westerlies: These wide wind belts stretch from approximately 30 degrees to 60 degrees north and south latitudes. In these areas, winds moving from the horse latitudes toward the poles are forced by the rotation of the earth to move somewhat from west to east. Pre-vailing westerlies are largely responsible for the west to east movement of weather across the United States and Canada.

Polar Easterlies: These wind belts extend from the poles to 60 degrees north and south latitude. In general, air movement is from east to west in this area because the earth is rotating faster than the movement of air above it. Air is twisted when force created by earth's rotation affects it as it attempts to flow away from the poles.